JP2002340002A - Assembling method for bearing having inside-diameter taper part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable simple and high-precise assembly even by a person with less experience without using an expensive precise measurement gauge for remaining radial clearance when the inside-diameter taper part of a tapered roller bearing is assembled to the outside-diameter taper part of a spindle. SOLUTION: After the inside diameter of a bearing outer 4 is measured, the bearing outer 4 is inserted in a housing 3 and the inside diameter is measured again to determine a difference in the inside diameter (shrinkage allowance). Based on the difference (the shrinkage allowance), an additional value to calculate the thickness of a spacer is determined through calculation. Meanwhile, an assembly body where the bearing outer 4, a tapered roller 5, and a bearing inner 6 are assembled is brought into a state that the assembly body bites into an outer-diameter taper part 1t of a spindle 1 under own weight to measure a clearance c of a spacer mounting space part h. A spacer thickness is determined from a measurement value of the clearance c and the additional value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a bearing having an inner diameter tapered portion to an outer diameter tapered portion of a spindle.

[0002]

2. Description of the Related Art Conventionally, a cylindrical roller bearing 5 is provided on an outer diameter tapered portion 51t of a spindle 51 as shown in FIG.
When assembling the cylindrical roller bearing 52, if the cylindrical roller bearing 52 is composed of a bearing outer 53, a cylindrical roller 54 as a bearing, and a bearing inner 55, the spacer 56 is mounted so that the spindle 51 can be smoothly rotated. By appropriately adjusting the thickness, when the bearing inner 55 is driven into the outer diameter tapered portion 51t, the driving amount is appropriately regulated by the spacer 56, so that there is no backlash in the rotation, and conversely, the rotation is heavy. It is necessary to assemble it not too much.

For this reason, conventionally, the following procedure is used to appropriately determine the thickness of the spacer 56. That is, as shown in FIG. 4A, the bearing outer 53 is press-fitted into the housing 57, and the inner diameter of the bearing outer 53 is measured by the inner diameter measuring gauge G.
(B) The residual radial clearance precision measurement gauge Z as shown in FIG.
Set to. Next, as shown in FIG. 4C, the bearing inner 55 and the cylindrical roller 54 are connected to the outer diameter tapered portion 51t.
And the outer surface thereof is covered with the residual radial clearance precision measurement gauge Z, the block gauge B is set on the spacer mounting portion, and the bearing inner 55 is driven by the driving jig T so that the rotational weight of the spindle 51 is reduced. At an appropriate time, the gap at that time is measured by the block gauge B. Then, once, the bearing inner 55 and the cylindrical roller 5
4 is removed and the spacer 56 is flat-polished based on the value measured by the block gauge B, and thereafter, FIG.
As shown in the figure, the spacer 56 is set on the mounting portion,
The bearing inner 55 is driven into the main assembly by driving the driving jig T.

[0004]

However, in the conventional method, adjustment of the weight and play of the spindle rotation at the time of assembling depends on the intuition and tips of the operator, and the assembling work is difficult for beginners and the like. There was a problem. In addition, the residual radial clearance precision measurement gauge Z for accurately assembling is convenient for assembling in a short time with high accuracy, but is a dedicated product corresponding to each spindle diameter, and a unit price per piece. In addition, there are various problems such as high accuracy, high accuracy, and a certain level of skill is required, and furthermore, care must be taken to avoid impact during handling.

Accordingly, an object of the present invention is to make it possible to easily and accurately assemble even a beginner with little experience without using an expensive residual radial gap precision measuring gauge.

[0006]

To achieve the above object, the present invention provides a method of assembling a bearing outer and a bearing comprising a bearing and a bearing inner to an outer diameter tapered portion of a spindle after measuring an inner diameter of the bearing outer. The bearing outer is inserted into the housing and the inner diameter is measured to determine a difference from the measured inner diameter (i.e., the allowance). Based on the difference, an additional value for calculating the spacer thickness is calculated. In the outer diameter taper portion of the spindle, the assembled body of the bearing outer, the bearing, and the bearing inner is bitten by its own weight, and the gap in the spacer mounting gap at this time is measured, and the measured gap value and the spacer thickness calculation are performed. The spacer thickness is determined based on the value obtained by adding the added value for It was way.

As described above, by eliminating the parts relying on experience and tips in each process, even beginners with little experience can easily and accurately assemble them, and an expensive residual radial clearance precision measuring gauge. Can be assembled without using. In addition, it is an empirical rule to determine the spacer thickness based on the value obtained by adding the added value based on the allowance of the bearing outer and the gap value when the assembled body is bitten by its own weight, In addition, an empirical value or the like is used as a coefficient or the like which is a basis of calculation when obtaining an added value by calculation from the margin.

[0008]

Embodiments of the present invention will be described with reference to the accompanying drawings. Here, FIG. 1 is a process diagram of a method of assembling a bearing according to the present invention, FIG. 2 is an explanatory view of the same, and FIG.

According to the method of assembling a bearing according to the present invention, for example, when assembling a cylindrical roller bearing having an inner diameter tapered portion to an outer diameter tapered portion of a spindle, it does not require an expensive jig or the like and has little experience. It is designed so that even a person can easily and accurately assemble them. First, before explaining an assembling method, an assembling state of such a cylindrical roller bearing will be described.

That is, as shown in FIG. 3, the outer diameter taper portion 1t of the spindle 1 is rotatably supported by the cylindrical roller bearing 2 with respect to the housing 3, and the outer bearing 4 of the cylindrical roller bearing 2 is 3, the bearing inner 6 is fitted into the outer diameter tapered portion 1t of the spindle 1 in close contact with the bearing inner 6, and
Between the bearing outer 4 and the bearing inner 6,
A cylindrical roller 5 as a bearing is interposed. The inner surface of the bearing inner 6 has an outer diameter tapered portion 1t.
The inner diameter taper portion 6t is formed so as to fit into the bearing inner portion. The amount of press-fit of the bearing inner 6 is appropriately regulated by the spacer 7. Incidentally, another bearing is disposed between the shaft portion of the spindle 1 and the housing 3.

Next, a method of assembling the cylindrical roller bearing 2 according to the present invention will be described with reference to FIGS. First, as shown in FIG. 2A, the inner diameter of the bearing outer 4 is measured by the inner diameter measuring gauge G. Next, FIG.
As shown in (b), the bearing outer 4 is inserted into the housing 3, the inner diameter is measured again by the inner diameter measuring gauge G, and the difference from the previous inner diameter measured value is obtained, thereby obtaining the allowance.

Next, as shown in FIG. 1, a certain coefficient (for example, 5 μm) is subtracted from the margin, and the obtained value is divided by a constant (for example, 0.8) corresponding to the degree of taper. This value is multiplied by a certain coefficient (for example, 10), and this value is set as an added value. The coefficients and the like used in these calculations are empirical values.

On the other hand, a bearing inner 6 and a cylindrical roller 5
And the assembled body with the bearing outer 4 assembled,
As shown in FIG. 2C, the shaft 1 is inserted into the shaft portion of the spindle 1 so that the outer diameter taper portion 1t of the spindle 1 bites under its own weight, and the gap c in the spacer mounting space h at this time is measured. .

Then, the measured value of the gap c and the added value are added, and this is added to a certain tolerance range (for example, +0, -0.00).
In 5), the spacer 7 is flat-polished.

When the flat polishing of the spacer 7 as described above is completed, the main assembly of the cylindrical roller bearing 2 is started. First, the bearing outer 4 is assembled into the housing 3, and then the flat-polished spacer 7 is removed from the spacer 7. The bearing inner 6 is set in the bearing outer 4 by sandwiching the bearing inner 6 at four places in the mounting space h, and the bearing inner 6 is driven by a driving jig.
If you type, the assembly is completed.

The cylindrical roller bearing 2 assembled in such a manner can obtain an appropriate rotational weight. In addition, an expensive residual radial gap precision measurement gauge as in the related art is not required, and the cost can be reduced.

The present invention is not limited to the above embodiment. Those having substantially the same configuration as those described in the claims of the present invention and having the same functions and effects belong to the technical scope of the present invention. For example, a coefficient for calculating an addition value is an example.

[0018]

As described above, the method for assembling a bearing according to the present invention is based on the conventional method in which a highly skilled person relies on intuition and knack, and also uses an expensive strain gauge.
Since anyone can easily and accurately assemble even without a gauge, the quality of the assembled product can be made excellent and uniform, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a process diagram of a method for assembling a bearing according to the present invention.

FIG. 2 is an explanatory view of an assembling method.

FIG. 3 is an assembled state diagram of a bearing.

FIG. 4 is an explanatory view of a conventional assembling method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Spindle, 1t ... Outer diameter taper part, 2 ... Cylindrical roller bearing, 3 ... Housing, 4 ... Bearing outer, 5 ... Cylindrical roller, 6 ... Bearing inner, 6t ... Inner diameter taper part, 7
... spacer, h ... spacer mounting space, c ... gap.

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Claims (1)

[Claims] 1. A method of assembling a bearing comprising a bearing outer, a bearing and a bearing inner to an outer diameter tapered portion of a spindle, wherein a step of measuring an inner diameter of the bearing outer, and inserting the bearing outer into a housing. After measuring the inner diameter, a step of calculating a difference from the measured inner diameter, a step of calculating an additional value for calculating a spacer thickness by calculation based on the difference, and And the assembly of the bearing and the bearing inner into the bite state by its own weight, the step of measuring the gap of the spacer mounting gap portion at this time, and the value obtained by adding the added value and the gap measurement value for the spacer thickness calculation Determine the spacer thickness based on
A method of assembling a bearing having an inner diameter tapered portion, wherein the assembling is performed using a spacer having this thickness.